Yes, all male offspring will receive a copy. But it shouldn’t affect their appearance as it’s recessive and one copy isn’t enough - males need two copies of chocolate to appear chocolate (I assume by brown you mean chocolate).

Another breeding scenario:Drake with extended black and 2 copies of the chocolate(brown) dilution gene. So he is visually a chocolate coloured bird.Duck is heterozygous for dusky, no extended black or chocolate (brown) dilution genes. She looks dark mallard like dusky with eye stripe.Is there any chance a percentage of male offspring will receive extended black and two copies of chocolate from the male parent?Or does the female parent need to carry chocolate gene in order to breed a visually chocolate drake.Ie a copy of chocolate from duck and a copy from drake.

Ok I understand now, I haven't used that calculator, however I do have a copy of colour breeding in domestic ducks by the Ashton's. Sometimes it's better to have a chat with someone about a subject.Thank you

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